Piston remover



June 19, 1951 B. L. MYERS 2,557,611

PISTON REMOVER Filed July 12, 1950 INVENTOR- fless lp @0119 MOWCQZW ATTORNEYS Patented June 19, 1951 PISTON REMOVER Bess L. Myers, Sikeston, Mo., assignor to Sikeston Tractor and Implement Company, Sikeston, Mo., a corporation of Missouri Application July 12, 1950, Serial No. 173,257

4 Claims.

This invention relates to tools, and more particularly to a special tool for use in removing the piston from the cylinder of an internal combustion engine.

An object of the invention is to provide a simple tool which can be utilized in connection with the crank of the crank shaft to force the piston from the head of the engine after the engine head has been removed.

Further objects will more particularly appear in the course of the following description.

The invention consists in the novel construction, arrangement and combinations of parts hereinafter more particularly described and claimed.

One sheet of drawings accompanies this specification as part thereof, in which like reference characters indicate like parts throughout.

In the drawings:

Figure 1 is a vertical longitudinal cross section largely diagrammatic through an engine cylinder and crank case, with the engine head removed;

Figure 2 is a view similar to Figure 1 showing the piston expelled from the cylinder;

Figure 3 is a side elevation of the improved tool partly broken away;

Figure 4 is an end view of Figure 3;

Figure 5 is a cross section taken on line 55 of Figure 3; and

Figure 6 is a cross section taken on line 68 of Figure 3.

The improved tool comprises a base member I of some suitable rigid material softer than the material of which the cylinder is formed so as to avoid scarring the cylinder if the ends of this body come in contact with the same.

Projecting from one face of the body l are two spaced studs 22 which are proportioned and distanced apart properly to seat in the bolt holes formed in the connecting rod bearing by means of which normally the two bearing members are secured to the crank of the engine. As herein illustrated, these studs 2 are shown as pins seated in orifices formed in the body i, but as will be understood, they may be formed integral with the body I, if desired.

Medially of the two stud members 22 the body A is formed with a transverse hole 3 and the upper face is provided with a concave notch It over the hole 3.

A second triangular-shaped body 6 is provided having one side formed with a concave notch 8 adapted to seat on the crank S of the engine, while the apex opposite this concave side is rounded as indicated at H, and spaced slightly from the apex is a transverse hole 1 corresponding to the hole 3 in the body I by means of which holes 3 and l the triangular member 6 is hinged to the body member I by a, U-bolt 4, the arms of which extend through the holes 3 and i, respectively, and preferably the free ends of the legs of the bolt 4 are bridged as by member 5 against which the securing nuts 9 are tightened.

By reason of the structure just described it will be apparent that the triangular member a is provided with a rocking hinge connection by means of which the rounded apex I! can adjust itself within limits provided by the concave notch in in the body I.

In use the crank will be turned until the piston is in its outermost position, as illustrated in full lines in Figure 1, in which position the bottom bearing member will be removed, thus releasing the crank S and permitting the further rotation of the crank until the same reaches its remote position, as is also illustrated in Figure 1. With the piston and the crank in position shown in full lines in Figure 1, my improved tool is applied by inserting the studs 2 of the body I into the bolt holes H of the connecting rod bearing B, and the concave notch 8 in the triangular member 6 is fitted over the crank S. The position of the device with respect to the crank is shown in Figure 1 in position marked a.

Thereafter, the crank will be rotated in a clockwise direction as indicated by the arrow in Figure l, forcing the crank to the position shown and marked 2) in that figure.

Further rotation of the crank in a clockwise direction, as indicated by the arrow in Figure 2, will carry the crank respectively to the positions marked 0 and d in Figure 2 in which latter position, shown in full lines, the piston will have been completely expelled from the cylinder.

Modifications in the specific shape and form of the elements will readily suggest themselves to those skilled in the art and within the scope of the present invention as claimed.

,7 Having thus fully described my invention, I claim:

1. Tool for removing pistons from internal combustion engines, comprising a body of rigid material having on one face spaced outwardly extending studs adapted to seat in the bolt holes in the connecting rod bearing and having a transverse hole midway between said studs and perpendicular to a line connecting same, a triangular member having at its apex a transverse 3 hole, a U-bolt hingedly connecting said members through said holes, the base end opposite said apex being formed With an arcuate depression adapted to seat on the crank of the engine.

2. Tool for removing pistons from internal combustion engines comprising, a member formed to bridge the connecting rod bearing having means to engage the bolt holes in said bearing. a triangular member having one apex hingedly associated with said bridge member by a link having spaced parallel arms pivoted respectively in the said apex end and medially of the bolt hole engaging means, the end of said triangular member opposite said hinged apex being concave and adapted to seat on the engine crank.

3. Tool for removing pistons from internal combustion engines comprising a rigid body proportioned to bridge the connecting rod bearing having on one face outwardly extending :lugs to seat in the bolt holes in said bearing and formed 20 on the opposite face with a concave transverse groove medially positioned with respect to said lugs, a-triangular body having one side concave end can adjust itself in said groove lengthwise of the bearing bridging member.

BESS L. MYERS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 282,828 Worswick Aug. '7, 1883 1,385,436 Egloff July 26, 1921 

